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Saint Thomas Aquinas, O.P., is considered the father of Thomism. See the links below for more resources on Saint Thomas Aquinas.
Corpus Thomsticum: The Corpus Thomisticum project aims to provide scholars with a set of online instruments of research and Thomas Aquinas.
The Summa Theologica of St. Thomas Aquinas- . Summa Theologica is the best-known work of Thomas Aquinas (c. 1225–1274). It was intended as an instructional guide for theology students, including seminarians and the literate laity. It was a compendium of all of the main theological teachings of the Catholic Church. It presents the reasoning for almost all points of Christian theology in the West. The Summa's topics follow a cycle: God; Creation; Man; Man's purpose; Christ; the Sacraments; and back to God.